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Mass Transfer

Mass Transfer
If moisture content of solid on dry basis is X, then the same on wet basis is

X/(X + 1)
(X - 1)/X
X/(X - 1)
(X + 1)/X

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Mass Transfer
Humidity chart is useful for the solution of problems concerning condensation, vaporisation and air conditioning. At a given dry bulb temperature, value of humidity obtained from the humidity chart directly, is in terms of __________ humidity.

Molal
Percentage
Relative
None of these

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Mass Transfer
Antibiotics are best handled in a

Rotating disc contactor
Podbielniak extractor
Pulsed column extractor
Sieve tray contractor

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Mass Transfer
Which of the following mixtures does not form an azeotrope at atmosheric pressure?

Water-alcohol
Butyl acetate-water
None of these
Methyl alcohol-acetone

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Mass Transfer
The drying time between fixed moisture contents within the 'constant rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

T1.5
T3
T
√T

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Mass Transfer
In case of gases, the binary diffusivity is proportional to (where, P = pressure)

1/P
√P
P
1/√P

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